Method subscribe

packages/core/src/event_emitter.ts:98–98

* Registers handlers for events emitted by this instance. * @param next When supplied, a custom handler for emitted events. * @param error When supplied, a custom handler for an error notification from this emitter. * @param complete When supplied, a custom handler for a completion notifica

(
    next?: (value: T) => void,
    error?: (error: any) => void,
    complete?: () => void,
  )

   *     emitter.
   */
  subscribe(
    next?: (value: T) => void,
    error?: (error: any) => void,
    complete?: () => void,